Example of feature enable/disable in gutter

gutter_example.py

from distutils.version import StrictVersion
class User(object):
    def __init__(self, version='2.0.0'):
        self.app_version = version

class UserArgument(User):
    COMPATIBLE_TYPE=User

    def __init__(self, input):
        self.applies = 1
        self.input = input
        super(UserArgument, self).__init__(input.app_version)


def gutter_example():
    from gutter.client.default import gutter
    from gutter.client.settings import manager as manager_settings
    from durabledict import RedisDict
    from redis import Redis
    from gutter.client.models import Switch, Condition
    from gutter.client.operators.comparable import MoreThan


    manager_settings.storage_engine = RedisDict(keyspace='gutter', connection=Redis())
    manager_settings.autocreate = True

    condition = Condition(
        argument=UserArgument,
        attribute='app_version',
        operator=MoreThan(lower_limit=StrictVersion('1.2.1')))

    switch = Switch('cool_feature', state=2)
    switch.conditions.append(condition)
    gutter.register(switch)

    user1 = User('2.0.0')
    print "Is active? {0}".format(gutter.active('cool_feature', user1))

    user2 = User('1.0.0')
    print "Is active? {0}".format(gutter.active('cool_feature', user2))

if __name__ == "__main__":
    gutter_example()